Nico di Angelo could also be included. His powers over the dead and his dark past make him an interesting character. In an au fanfiction, he could be a reluctant ally to Percy and Thalia at first. Maybe they need his help to enter the Underworld to retrieve something important. Nico's brooding nature and his own internal struggles would contrast with Percy's more optimistic attitude and Thalia's fierce determination, creating a rich tapestry of character interactions.
Annabeth would be a great addition. Her intelligence and strategic thinking could add a lot to the story. For example, in a situation where Percy and Thalia are stuck in a maze - like the Labyrinth - Annabeth's knowledge of architecture and mythology could help them find their way out. She could also create some interesting relationship dynamics, like a friendly rivalry with Thalia.
The Hunters of Artemis could be a great addition. Since Thalia was once a part of them, it would be interesting to see how she interacts with them again, especially in the context of her relationship with Percy. Zoe Nightshade, if brought back in some way, could be a very cool character to include. She has a strong personality and a tragic backstory. Also, Clarisse La Rue could be in the story. Her tough - as - nails attitude and her rivalry with Percy could spice things up, especially when it comes to the relationship between Percy and Thalia.
Grover would be a great addition. In an AU, he could be Percy's best friend who is always getting him into (and out of) trouble. For example, in a college AU, Grover could be the one who convinces Percy to join a wild fraternity. He could also provide some comic relief. Another good character is Thalia. In a superhero AU, she could be a powerful superheroine with lightning powers. She could be a mentor or a rival to Percy and Annabeth, depending on the plot.
A popular one is 'Percy and Thalia: The Forgotten Bond'. It takes their friendship and adds a whole new layer of mystery. It's set during a time when they have to rely on each other more than ever, and the way the story unfolds is really engaging.
Annabeth is often a popular character. In fanfiction, she might play a crucial role in helping Percy deal with his complex identity as the son of Kronos. Grover could also be popular as he's Percy's loyal friend and could be there to support Percy through his struggles related to his new - found heritage.
Annabeth is a great choice. Her intelligence and strategic thinking could add a lot to the story. For example, when Percy and Grover are in a tight spot, she could come up with a clever plan to get them out. Another good character is Tyson. His strength and loyalty would be useful in battles and dangerous situations.
Jason is another good choice. He has a history with both Percy and Reyna. His leadership skills and his connection to the Roman side of the demigod world could bring in new plotlines. For example, he could help Percy and Reyna understand some of the more complex Roman demigod politics that they need to navigate.
A popular one is 'Thalia and Percy: The New Prophecy'. It takes place after the main series and imagines a new prophecy that involves both of them. The story has a lot of action and adventure, and the way the author writes their interactions is really engaging.
One great 'Percy Jackson Guardian Thalia Fanfiction' is 'Thalia's New Quest'. It shows Thalia in a whole new adventure, facing challenges that really test her skills as a guardian. The author does a great job of portraying her strong and independent nature.
I really like 'Thalia and Percy's New Quest'. In this fanfic, they are sent on a special mission that no one else could handle. The author does a great job of portraying their individual strengths and how they combine them to succeed. It's full of action and a bit of humor too.
One great 'Percy Jackson' fanfiction about Annabeth and Thalia is 'The Bond of the Demigods'. It focuses on their friendship and how they support each other during difficult quests. They work together to overcome challenges that neither could face alone, and it really shows their strong personalities.